Module:User:Sarri.greek/stems

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-- 2024.03.04. [[wikt:en:User:Sarri.greek]] from [[wikt:el:Module:stems]]
--[=[
STEM PRODUCTION for any language
Create stems or other parts of PAGENAMEs of any words
to invoke directly from other modules or from templates
NOT recommended: DO NOT create Templates.
To use e.g. at inflection tables. For languages with changing [[diacritic]]]s
further changes may be handled in language-specific modules.

What is?
lemma,1,-3 = for lemma START at 1st letter and STOP at 3rd letter from the end = cut off 2 letters form end.

USE with invoke + function name. Examples: 
From Templates or any page, write
* if you need the PAGENAME:  {{#invoke:User:Sarri.greek/stems|word_minus_1end}}
* if you need a different word:  {{#invoke:User:Sarri.greek/stems|word_minus_1end|lemma=yourword}}
From other modules, write
* if you need a PAGENAME: require("Module:User:Sarri.greek/stems").word_minus_1end
* if you need a different word:  ??
NOT recommended: Create Templates with the functions marked with -t
* word-minus-1last-t, ...

CONTENTS
1) minus letters from end
* word_minus_0.... may use PAGENAME or lemma= instead.
* word_minus_1end_t (for a Template, not recommended)
* word_minus_1end (to inovke) = word (lemma or PAGENAME) minus 1 letter from the end
* word_minus_2end... etc minus 2 letters from end, -3, -4, -5, -6
2) word_minus_hyphen & word_minus_hyphen_i (take away hyphen from affixes. Use for Reverse index searches)
--) ... may add: minus letters from beginning. Like word-minus-1first
--) ... may add: write letters from beginning. Like word-write-1first
]=]--

local export = {}

--------------------------------------------------------------------------
--         1)  PAGENAME or lemma minus letters from the end             --
--------------------------------------------------------------------------

-- minus 0 letters from end: use {{PAGENAME}} or lemma=
-- ============= word_minus_0 for Templates =============== --
-- PAGENAME or lemma minus 0 letters for Template:word-0
function export.word_minus_0(arg)
	if type(arg) == 'table' and type(arg.getParent) == 'function' then
		local frame = arg
		local args = frame:getParent().args
		term = args['lemma'] or '' -- add for your language: args['yourlang'] or 
	else
		term = arg
	end
    PAGENAME = mw.title.getCurrentTitle().text
    lemma = PAGENAME:match( "^%s*(.-)%s*$" )
	if term ~= '' then lemma = term end
    if lemma == '' then lemma = PAGENAME:match( "^%s*(.-)%s*$" ) end
return mw.ustring.sub(lemma,1,-1)	
end

-- ============= word_minus_0_i to invoke =============== --
-- PAGENAME or lemma minus 0 letters, direct invoke
function export.word_minus_0_i(frame)
--	local args = frame:getParent().args	-- for Templates
	local args = frame.args				-- invoke
-- lemma
	local lemma = args['lemma'] or ''
	PAGENAME = mw.title.getCurrentTitle().text
	if lemma  == '' or lemma == nil then args['lemma'] = PAGENAME:match( "^%s*(.-)%s*$" )	
				-- trim empty spaces ( "^%s*(.-)%s*$" ) from beginning and end. Found at all Modules.
		else lemma = args['lemma']
	end
return mw.ustring.sub(lemma,1,-1)
end

-- ============= word_minus_1end for Templates =============== --
-- PAGENAME or lemma minus 1 letter from the end for Template:word-1
function export.word_minus_1end(arg)
	if type(arg) == 'table' and type(arg.getParent) == 'function' then
		local frame = arg
		local args = frame:getParent().args
		term = args['lemma'] or '' -- add for your language: args['yourlang'] or 
	else
		term = arg
	end
    PAGENAME = mw.title.getCurrentTitle().text
    lemma = PAGENAME:match( "^%s*(.-)%s*$" )
	if term ~= '' then lemma = term end
    if lemma == '' then lemma = PAGENAME:match( "^%s*(.-)%s*$" ) end
return mw.ustring.sub(lemma,1,-2)	
end

-- ============= word_minus_1end_i to invoke =============== --
-- PAGENAME or lemma minus 1 letter from the end, direct invoke
function export.word_minus_1end_i(frame)
--	local args = frame:getParent().args	-- for Templates
	local args = frame.args				-- invoke
-- lemma
	local lemma = args['lemma'] or ''
	PAGENAME = mw.title.getCurrentTitle().text
	if lemma  == '' or lemma == nil then args['lemma'] = PAGENAME:match( "^%s*(.-)%s*$" )	
				-- trim empty spaces ( "^%s*(.-)%s*$" ) from beginning and end. Found at all Modules.
		else lemma = args['lemma']
	end
return mw.ustring.sub(lemma,1,-2) 
	-- 1 = start at 1st letter
	-- -2 = stop at the 2nd letter from the end = cut of the 1st from the end
end

-- ============= word_minus_2end for Templates =============== --
-- PAGENAME or lemma minus 2 letters from the end, for Template:word-2 [[Template:User:Sarri.greek/word-minus-2end]]
function export.word_minus_2end(arg)
	if type(arg) == 'table' and type(arg.getParent) == 'function' then
		local frame = arg
		local args = frame:getParent().args
		term = args['lemma'] or ''
	else
		term = arg
	end
    PAGENAME = mw.title.getCurrentTitle().text
    lemma = PAGENAME:match( "^%s*(.-)%s*$" )
	if term ~= '' then lemma = term end
    if lemma == '' then lemma = PAGENAME:match( "^%s*(.-)%s*$" ) end
return mw.ustring.sub(lemma,1,-3)	
end

-- ============= word_minus_2end_i to invoke =============== --
-- PAGENAME or lemma minus 2 letters from the end, direct invoke
function export.word_minus_2end_i(frame)
--	local args = frame:getParent().args	-- for Templates
	local args = frame.args				-- invoke
-- lemma
	local lemma = args['lemma'] or ''
	PAGENAME = mw.title.getCurrentTitle().text
	if lemma  == '' or lemma == nil then args['lemma'] = PAGENAME:match( "^%s*(.-)%s*$" )	
				-- trim empty spaces ( "^%s*(.-)%s*$" ) from beginning and end. Found at all Modules.
		else lemma = args['lemma']
	end
return mw.ustring.sub(lemma,1,-3)
end

-- ============= word_minus_3end for Templates =============== --
-- PAGENAME or lemma minus 3 letters from the end for Template:word-3
function export.word_minus_3end(arg)
	if type(arg) == 'table' and type(arg.getParent) == 'function' then
		local frame = arg
		local args = frame:getParent().args
		term = args['lemma'] or ''
	else
		term = arg
	end
    PAGENAME = mw.title.getCurrentTitle().text
    lemma = PAGENAME:match( "^%s*(.-)%s*$" )
	if term ~= '' then lemma = term end
    if lemma == '' then lemma = PAGENAME:match( "^%s*(.-)%s*$" ) end
return mw.ustring.sub(lemma,1,-4)	
end

-- ============= word_minus_3end_i to invoke =============== --
-- PAGENAME or lemma minus 3 letters from the end, direct invoke
function export.word_minus_3end_i(frame)
--	local args = frame:getParent().args	-- for Templates
	local args = frame.args				-- invoke
-- lemma
	local lemma = args['lemma'] or ''
	PAGENAME = mw.title.getCurrentTitle().text
	if lemma  == '' or lemma == nil then args['lemma'] = PAGENAME:match( "^%s*(.-)%s*$" )	
				-- trim empty spaces ( "^%s*(.-)%s*$" ) from beginning and end. Found at all Modules.
		else lemma = args['lemma']
	end
return mw.ustring.sub(lemma,1,-4)
end

-- ============= word_minus_4end for Templates =============== --
-- PAGENAME or lemma minus 4 letters from the end, for Template:word-4
function export.word_minus_4end(arg)
	if type(arg) == 'table' and type(arg.getParent) == 'function' then
		local frame = arg
		local args = frame:getParent().args
		term = args['λήμμα'] or args['lemma'] or ''
	else
		term = arg
	end
    PAGENAME = mw.title.getCurrentTitle().text
    lemma = PAGENAME:match( "^%s*(.-)%s*$" )
	if term ~= '' then lemma = term end
    if lemma == '' then lemma = PAGENAME:match( "^%s*(.-)%s*$" ) end
return mw.ustring.sub(lemma,1,-5)	
end

-- ============= word_minus_4end_i to invoke =============== --
-- PAGENAME or lemma minus 4 letters from the end, direct invoke
function export.word_minus_4end_i(frame)
--	local args = frame:getParent().args	-- for Templates
	local args = frame.args				-- invoke
-- lemma
	local lemma = args['lemma'] or ''
	PAGENAME = mw.title.getCurrentTitle().text
	if lemma  == '' or lemma == nil then args['lemma'] = PAGENAME:match( "^%s*(.-)%s*$" )	
				-- trim empty spaces ( "^%s*(.-)%s*$" ) from beginning and end. Found at all Modules.
		else lemma = args['lemma']
	end
return mw.ustring.sub(lemma,1,-5)
end


-- ============= word_minus_5end for Templates =============== --
-- PAGENAME or lemma minus 5 letters from the end, for Template:word-5
function export.word_minus_5end(arg)
	if type(arg) == 'table' and type(arg.getParent) == 'function' then
		local frame = arg
		local args = frame:getParent().args
		term = args['lemma'] or ''
	else
		term = arg
	end
    PAGENAME = mw.title.getCurrentTitle().text
    lemma = PAGENAME:match( "^%s*(.-)%s*$" )
	if term ~= '' then lemma = term end
    if lemma == '' then lemma = PAGENAME:match( "^%s*(.-)%s*$" ) end
return mw.ustring.sub(lemma,1,-6)	
end

-- ============= word_minus_5end_i to invoke =============== --
-- PAGENAME or lemma minus 5 letters from the end, direct invoke
function export.word_minus_5end_i(frame)
--	local args = frame:getParent().args	-- for Templates
	local args = frame.args				-- invoke
-- lemma
	local lemma = args['lemma'] or ''
	PAGENAME = mw.title.getCurrentTitle().text
	if lemma  == '' or lemma == nil then args['lemma'] = PAGENAME:match( "^%s*(.-)%s*$" )	
				-- trim empty spaces ( "^%s*(.-)%s*$" ) from beginning and end. Found at all Modules.
		else lemma = args['lemma']
	end
return mw.ustring.sub(lemma,1,-6)
end


-- ============= word_minus_6end for Templates =============== --
-- PAGENAME or lemma minus 6 letters from the end, for Template:word-6
function export.word_minus_6end(arg)
	if type(arg) == 'table' and type(arg.getParent) == 'function' then
		local frame = arg
		local args = frame:getParent().args
		term = args['lemma'] or ''
	else
		term = arg
	end
    PAGENAME = mw.title.getCurrentTitle().text
    lemma = PAGENAME:match( "^%s*(.-)%s*$" )
	if term ~= '' then lemma = term end
    if lemma == '' then lemma = PAGENAME:match( "^%s*(.-)%s*$" ) end
return mw.ustring.sub(lemma,1,-7)	
end

-- ============= word_minus_6end_i to invoke =============== --
-- PAGENAME or lemma minus 6 letters from the end, direct invoke
function export.word_minus_6end_i(frame)
--	local args = frame:getParent().args	-- for Templates
	local args = frame.args				-- invoke
-- lemma
	local lemma = args['lemma'] or ''
	PAGENAME = mw.title.getCurrentTitle().text
	if lemma  == '' or lemma == nil then args['lemma'] = PAGENAME:match( "^%s*(.-)%s*$" )	
				-- trim empty spaces ( "^%s*(.-)%s*$" ) from beginning and end. Found at all Modules.
		else lemma = args['lemma']
	end
return mw.ustring.sub(lemma,1,-7)
end


--------------------------------------------------------------------------
--                   2)  PAGENAME or lemma minus hyphen                 --
-- tests at [[Module_talk:User:Sarri.greek/stems#minus_hyphen]]
--------------------------------------------------------------------------

-- ============= word_minus_hyphens for Templates =============== --
-- PAGENAME or lemma minus hyphen at beginning or at end or both
function export.word_minus_hyphen(arg)
	if type(arg) == 'table' and type(arg.getParent) == 'function' then
		local frame = arg
		local args = frame:getParent().args
		term = args['lemma'] or ''
-- can i please also have args['1'] too ??
	else
		term = arg
	end
    PAGENAME = mw.title.getCurrentTitle().text
    lemma = PAGENAME:match( "^%s*(.-)%s*$" )
	if term ~= '' then lemma = term end
    if lemma == '' then lemma = PAGENAME:match( "^%s*(.-)%s*$" ) end
--?? WHATttt must I write for him to understand that lemma = args['lemma']??    
-- careful: DO NOT write ?????????????  this works only for lemma= NOT for PAGENAMES
    -- ^ means: at beginning $ means: at end 
    -- 1 start at 1st letter / -2 stop at 2nd letter from end (cut off the last, which is a hyphen)
    if mw.ustring.find(lemma, '[-]$') and not  mw.ustring.find(lemma, '^[-]') 
    then result = mw.ustring.sub(lemma,1,-2) end
	-- 2 start at 2nd letter / -1 stop at 1st letter from end
    if mw.ustring.find(lemma, '^[-]') and not mw.ustring.find(lemma, '[-]$')
    then result = mw.ustring.sub(lemma,2,-1) end
    -- both
    if mw.ustring.find(lemma, '^[-]') and mw.ustring.find(lemma, '[-]$')
    then result = mw.ustring.sub(lemma,2,-2) end
    -- neither (no change, produce the lemma as it is)
    if not mw.ustring.find(lemma, '^[-]') and not mw.ustring.find(lemma, '[-]$')
    then result = mw.ustring.sub(lemma,1,-1) end
    
return result
end -- close function

-- ============= word_minus_hyphens_i to invoke =============== --
-- PAGENAME or lemma minus hyphen at beginning or at end or both, direct invoke
function export.word_minus_hyphen_i(frame)
--	local args = frame:getParent().args	-- for Templates
	local args = frame.args				-- invoke
-- lemma
	local lemma = args['lemma'] or ''
-- can i please also have args['1'] too ??
	PAGENAME = mw.title.getCurrentTitle().text
	if lemma  == '' or lemma == nil then args['lemma'] = PAGENAME:match( "^%s*(.-)%s*$" )	
				-- trim empty spaces ( "^%s*(.-)%s*$" ) from beginning and end. Found at all Modules.
		else lemma = args['lemma']
	end
	
	-- the same as above
    if mw.ustring.find(lemma, '[-]$') and not mw.ustring.find(lemma, '^[-]') 
    then result = mw.ustring.sub(lemma,1,-2) end

    if mw.ustring.find(lemma, '^[-]') and not mw.ustring.find(lemma, '[-]$')
    then result = mw.ustring.sub(lemma,2,-1) end

    if mw.ustring.find(lemma, '^[-]') and mw.ustring.find(lemma, '[-]$')
    then result = mw.ustring.sub(lemma,2,-2) end
    
    if not mw.ustring.find(lemma, '^[-]') and not mw.ustring.find(lemma, '[-]$')
    then result = mw.ustring.sub(lemma,1,-1) end
    
return result
end -- close function


return export